wXWidgets: Change a Widget's Parent?

This sounds a lot like the problem I had with a glCanvas within a notebook control - at least if I'm reading you correctly. The glCanvas was at times drawing through all tabs (in os x - windows seemed ok). Flipping between tabs by hand would eventually get the drawing "right" - as in the correct tab contents would show and nothing else - but I never found an in-code solution. Eventually I took the easy way out and designed around the problem by removing canvases from notebook controls altogether.

I'll be interested in hearing how you go with this.